body{overflow:hidden;margin:0;background-color:#000}#spinner{position:fixed;top:50%;left:50%;width:50px;height:50px;margin:-25px 0 0 -25px;border:6px solid rgba(255,255,255,.3);background:"#000";border-top:6px solid #fff;border-radius:50%;animation:spin 1s linear infinite;display:none;z-index:9999}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}